UT230B series power sockets can be inserted to monitor the operating status (voltage, current, time, and power consumption, and more) of electrical appliances. Alarm will go off and display ‘OL’ when errors are found. The socket jacks are designed to meet the needs of different regions with proper certifications. UT230B series are ideal tools for maintaining equipment power consumption and a good tool for managing energy saving in homes, offices, schools, and other places.